Where do we start? Often, with a bang. Take our modern universe. It didn’t grow slowly and linearly, but was instead a violent departure from what came before. Big Bangs like this aren’t exclusive to cosmology: There are the sudden appearance of language and tool use, the Cambrian explosion in the diversity of life on Earth, and the sharp divergences of economic cycles.

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Space Colonization and the Meaning of Life
Colonizing the galaxy is the highest good humanity could achieve.
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The Surprising Importance of Stratospheric Life
The science of bacteria in the atmosphere is getting its moment in the sun.